Section 5.2- Gas Pressure Flashcards

1
Q

since gas molecules are in constant, rapid motion, they have

A

kinetic energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

equation for kinetic energy

A

KE= 1/2 mv^2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

the collisions of the gas molecules with the container walls constitute __________, defined as a force (push) per unit area

A

pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

pressure equation

A

P=F/A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

more important in the KE equation

A

velocity because it is squared

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

the SI unit for pressure

A

pascal (Pa)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

the more velocity an object has, the greater the _____________ and _____________

A

kinetic energy
temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

directly related to kinetic energy

A

pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

1 Pa is a _________ per square meter

A

newton (SI unit of force)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

the pressure exerted by the collisions of gas molecules in our atmosphere with the earth may be measured by a

A

barometer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

invented the mercury barometer

A

Evangelista Torricelli

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

a more compact and rugged type of barometer that senses pressure using a flexible, airtight metal box

A

aneroid barometer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

pressures in __________________ are convenient because they can be directly measured using mercury barometers and other similar devices

A

millimeters of mercury

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

is equal to 1 mmHg but is precisely defined in terms of the pascal

A

torr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

is average air pressure at sea level
equal to 760 torr

A

standard atmosphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

another term denoting 1 atm or 760 torr is

A

standard pressure

17
Q

another unit used for atmospheric pressure (especially in meteorology) is the __________, equal to 10^5 Pa

A

bar

18
Q

a common laboratory device used to measure the pressures of gas samples is the

A

manometer

19
Q

the two types of manometers

A

open-end manometer (one end open to atmosphere)
closed-end manometer (has a vacuum; not depend on atmospheric pressure)

20
Q

small gas pressures can be measured more accurately by using the

A

closed-end manometer